““Here's what hurst the most," Kafuku said. "I didn't truly understand her--or at least some crucial part of her. And it may well end that way now that she's dead and gone. Like a small, locked safe lying at the bottom of the ocean. It hurts a lot." Tatsuki thought for a moment before speaking. "But Mr. Kafuku, can any of us ever perfectly understand another person? However much we may love them?””